Consider two plots , where plot 'X' is having less species compared to plot 'Z', Select the true statement regarding X and Z .

Options

A. Plot 'X' shows less year to year variation in total biomass
B. Plot 'Z' is less resistant to natural disturbance
C. Plot, 'X' has more productivity than plot 'X'
D. Plot 'Z' has more productivity then plot 'X'

Answer

To solve the question regarding the two plots, X and Z, we need to analyze the information given about the number of species in each plot and the implications of that on various ecological factors.

### Step-by-Step Solution:

1. **Understanding the Plots**:
- Plot X has fewer species compared to Plot Z.
- This difference in species richness can influence various ecological characteristics such as productivity and resilience to disturbances.

2. **Analyzing the Statements**:
- **Statement 1**: "Plot X shows less year-to-year variation in total biomass."
- This statement is incorrect because the question does not provide any information about year-to-year variation in biomass. The relationship between species richness and biomass variation is not established in the question.

- **Statement 2**: "Plot Z is less resistant to natural disturbance."
- This statement is also incorrect. The question does not provide any information regarding the resistance of either plot to disturbances. Generally, more diverse ecosystems (like Plot Z) are more resilient to disturbances.

- **Statement 3**: "Plot X has more productivity than Plot Z."
- This statement is incorrect. Generally, plots with more species (like Plot Z) tend to have higher productivity due to greater resource utilization and niche differentiation.

- **Statement 4**: "Plot Z has more productivity than Plot X."
- This statement is correct. Since Plot Z has more species, it is likely to have higher productivity compared to Plot X, which has fewer species.

3. **Conclusion**:
- The true statement regarding the two plots is that "Plot Z has more productivity than Plot X."

### Final Answer:
The correct statement is: **Plot Z has more productivity than Plot X.**